Degradation of dye orange IV solution over Fe^IV-loaded resin in the presence of H₂O₂

In order to increase the reaction rate of the heterogeneous Fenton-like, the catalyst Fe^IVF=O/R was used to catalytically decompose H₂O₂ for the removal of Orange IV in aqueous solution. The effect of initial pH, temperature, initial H₂O₂ concentration and initial Orange IV concentration on the reaction rate was discussed. It is found that the reaction rate decreases with the increase of pH. The degradation of Orange IV can be effective at pH range of 3-10. This reaction follows pseudo-first-order kinetics. The activation energy for Fe^IVF/R catalyzed oxidation of Orange IV is determined to be 59.94 kJ/mol. The reaction rate is positively proportional to initial H₂O₂ concentration and initial Orange IV concentration respectively. Repeated use of catalyst does not decrease the removal rate of Orange IV.